The Variables Song
Lyrics by Doug Edmonds (to the tune of "I'll Be There" by Berry Gordy, Hal Davis, Willie Hutch, and Bob West)

In a science experiment, there are things called variables,
Each has a func-tion. Learn them well.

The indepen-dent variable, is that thing you test or change,
In every experiment, there's only ONE !

Now -- the -- de-pen-dent variable,
Is the thing that you measure in response to what you change.
It doesn't have to be just one thing,
It all depends on what the outcome is in response to what you change.

And in your da-ta table,
The first column's where you put,
The indepen-dent variable.

The other col-umns are reserved, for the de-pendent variable.
YOU CAN HAVE many tri-als.. TO TEST what you've changed.

AND WHAT ABOUT THE THINGS you keep the same?
They are called something dif-ferent; they are CONSTANTS, that's the name.
They're controlled so you're certain
That the outcomes that you measure, ARE IN response to what you change.

The indepen-dent variable, is the thing you test or change,
In every experiment, there's only ONE !

The depen-dent variable,
Is the response to that thing you changed,
Now you know the dif-ference,
Now keep it here. (pointing to head)

And don't for-get those con-stants,
All the things you keep the same
All these the variables,
That you learned.

In a science experiment, there are things called variables,
Each has a func-tion. Learn them well.